A. SIGHT B. LIES C. SITES D. SEATSĐỌC KỸ ĐOẠN VĂN SAU VÀ CHỌN PHƯ...

Câu 35: A. sight B. lies C. sites D. seatsĐọc kỹ đoạn văn sau và chọn phương án đúng (ứng với A, hoặc B, C, D) cho mỗi câu từ 36đến 44.The ocean bottom - a region nearly 2.5 times greater than the total land area of theEarth - is a vast frontier that even today is largely unexplored and uncharted. Until about acentury ago, the deep-ocean floor was completely inaccessible, hidden beneath watersaveraging over 3,600 meters deep. Totally without light and subjected to intense pressures5hundreds of times greater than at the Earth's surface, the deep-ocean bottom is a hostileenvironment to humans, in some ways as forbidding and remote as the void of outer space. Although researchers have taken samples of deep-ocean rocks and sediments for over acentury, the first detailed global investigation of the ocean bottom did not actually start until1968, with the beginning of the National Science Foundation's Deep Sea Drilling Project(DSDP).Using techniques first developed for the offshore oil and gas industry, the DSDP's10drill ship, the Glomar Challenger, was able to maintain a steady position on the ocean'ssurface and drill in very deep waters, extracting samples of sediments and rock from theocean floor. The Glomar Challenger completed 96 voyages in a 15-year research program thatended in November 1983. During this time, the vessel logged 600,000 kilometers and took15almost 20,000 core samples of seabed sediments and rocks at 624 drilling sites around theworld. The Glomar Challenger's core samples have allowed geologists to reconstruct whatthe planet looked like hundred of millions of years ago and to calculate what it will probablylook like millions of years in the future. Today, largely on the strength of evidencegathered during the Glomar Challenger's voyages, nearly all earth scientists agree on thetheories of plate tectonics and continental drift that 20explain many of the geological processes that shape the Earth. The cores of sediment drilled by the Glomar Challenger have also yielded informationcritical to understanding the world's past climates. Deep-ocean sediments provide a climaticrecord stretching back hundreds of millions of years, because they are largely isolated from25the mechanical erosion and the intense chemical and biological activity that rapidly destroymuch land-based evidence of past climates. This record has already provided insights intothe patterns and causes of past climatic change - information that may be used to predictfuture climates.